Intravenous-injection apparatus.



J. H. QUAYLE.

' INTRAVENOUS INJECTION APPARATUS.

APPLICAHON FILED JUNE 20, l9|8.

alto'nwg snares Para INTRAVENOUS-INJECTION APPARATUS.

Lesaom.

Specification of Letters Patent.

Patented Oct. 15, 1918.,

Application filed June 20, 1918. Serial No. 24Q,896.

'1 '0 all whom it may concern:

Be it known that I, Join: H. QUAYLE, a citizen of the United States, anda resident of Cleveland, in the county of Cuyahoga and State of Ohio,have invented certain new and useful Improvements inIntravenous-Injection Apparatus, of which the following is aspecification.

This invention relates to apparatus for intravenous injections in whichdrugs or solutions are injected into the veins of the circulatory systemof thehuman body as typified more particularly by the injection ofsalvarsan in the treatment of syphilis.

The general object of the present invention is to provide an apparatussimple in character and readily sterilizable by means of whichintravenous injections may be quickly and safely given.

It is a further object of the present invention to provide an apparatuswherein the introduction of air or particles of solid matter along withthe solution is prevented.

A further object is a device so constructed as to give an indication tothe operator of the entry of the needle into a vein.

A still further object is the provision of an apparatus in which all ofthe above functions are present in a unitary structure of simple design.

Further objects will appear in the course of the following disclosure.

In order to better illustrate the present invention and to enable a fullunderstanding thereof to be had, referenceis now made to theaccompanying drawing which forms "a portion of this specification and inwhich the figure is a side elevational view of one form of theinvention.

The apparatus, as shown, consists of a cylindrical lass tubular member1, the lower end 2 of which is beveled off at a sharp angle, the memberhaving a check valve 4 located therein as shown and seating against aconstriction to form a chamber 3. The valve 4 may be of either metal orglass preferably ground in its seat, and, if desired, the chamber 3 maybe of larger diameter than the bottom portion 1. Extending laterallyfrom this enlarged tubular portion or chamber 3 is a connecting tube 5adapted to receive a rubber tube 6 which in turn is connected with aglass syringe 7 of the usual type. Just above the lateral extension 5 anenlargement of the tubular member occurs, forming a second chamber 8.communicating with chamber 3 by means of a second check valve 9 similarin construction to the valve 4, but of larger dlameter. The progressiveenlargement of the tubular member permits of the ready removal orinsertion of the check valves, valve 4 passing readily through the valveorifice of check alve 9.

Just above the check valve 9 a connecting tube 10 extends laterally fromthe chamber 8 i which is adapted for the reception of a rubber tube 11connected to a hypodermic needle l2 of any preferred type, an indicatorconsisting of a short portion of glass tubing 13 being inserted in therubber tube 11 just back of the needle if desired. A cork or stopper 14for closing the chamber 8 completes the apparatus. I

In using the apparatus for intravenous inections it is first sterilized,a procedure read- 1ly accomplished by boiling the complete apparatus,and in which, owing to the entire absence of glass stop cocks or othercomplicated structure, there is little danger of breakage. Aftersterilization the lower tubular portion 1 of the apparatus isinserted ina suitable container of salvarsan or other desired solution, which isthen drawn up into the apparatus 'and syringe by manipulation of thesame, the stopper 14 at this time being removed. The rod of the syringeis then depressed, so that the tube 11, needle 12 and a portion of thechamber 8 become filled with the solution. In connection with thisoperation it is to be noted that the beveled end 2 of the tubular membereffectively prevents the gathering up of any solid or forelgn particlesin the solution which have settied to the bottom of the container, andany a1r in the system rises to the chamber 8 and escapes, so that theentrance of either solid matter or air bubbles into the circulatorysystem by the use of the apparatus is obviated.

As soon as the device has been filled with solution, the puncture ismade with the needle in the usual manner, a successful entrance into thevein being at once indicated by a slight rise of the level of thesolution in the chamber 8, owing to the venous pressure of the bloodbeing communicated to this chamber throu h the tube 11. Immediately uponthis in ication the stopper 14 is inserted, and the injection of thesolution is begun by means of the syringe 7, the chamber 8 now havingthe additional function of an air chamber to produce a. steady flow ofsolution independent of the impulse of the syringe, as Well as acting asan air separator or collector, the apparatus thus combining all theadvantages of both the gravity and pressure systems without any of thedangers attendant upon the use of either.

lVhile the above represents a preferred embodiment of the invention itis to be understood that all rights are reserved to such changes andmodifications as may fall Within the scope of the appended claims.

l lhat I claim is:

l. In an intravenous injection apparatus, the combination with ahypodermic needle and syrinoe, of a tubular member comprising a bottomportion, an intermediate chamber included between check valves andhaving a connection with said syringe, and an air separating and venouspressure indicating chamber located above said intermediate chamber andhaving connection with said hypodermic needle.

2. in an intravenous injection apparatus, the combination with ahypodermic needle and syringe, of a tubular t 'ansparent mem bercomprising a bottom portion the lower end of which is beveled, anintermediate chamber included between check valves and having aconnection with said syringe, an air separating and venous pressureindicating chamber located above said intermediate chamber and havingconnection with said hypodermic needle, and means for placing said airseparating and indicating chamher in communication with the atmospherewhen desired.

3. An intravenous injection apparatus comprising in combination, aunitary tubular structure having a bottom portion adapted to be immersedin a liquid, an intermediate portion in communication with said bottomportion through a check valve and haviateral tubular extension forconneci o a syringe, and a top transparent nor- ,eesnoo tion inconmiunication with said intermediate portion through a second checkvalve and having a lateral tubular extension for connection with ahypodermic needle, and means to placesaid top portion in communicationwith said atmosphere at will.

4-. An intravenous injection apparatus comprising in combination aunitary tubular transparent structure having a beveled bottom portionadapted to be immersed in a liquid, an intermediate portion incommunication with said bottom portion through a check valve and havinga lateral tubular extension for connection to a syringe, and a topportion in communication with said intermediate portion through a secondcheck valve and having a lateral tubular extension for connection with ahypodermic needle, and means to place said top portion in communicationwith said atmosphere at will.

5. An intravenous injection apparatus comprising in combination aunitary tubular multiple diametered transparent strue ture having abottom portion adapted to be immersed in a liquid, an intermediateportion having" communication with said bottom portion through anupwardly opening check valve, a lateral tubular extension therefrom forconnection to a syringe,

and a top portion of larger diameter than said intermediate portion andhaving communication therewith through a second up Wardly opening checkvalve, a lateral tubular extension from said top portion for comnectionto a hypodermic needle, the ratio of diameters of said top portion tosaid intermediate portion being such that said first mentioned checkvalve may be removed through the seat of said second check valve, bothof said valves being removable through said top "portion,

In testimony whereof have hereunto set hand, i.

